Ifferent cities. Study Zone Beijing Taihu Lanzhou Spring 23 7 two Summer 13 three 5 Autumn 24 13 23 Winter 35 16 205. Conclusions This study utilised two years of EBC concentration measurements at seven wavelengths in an urban location in Xuzhou, China. We discovered that the EBC concentrations in Xuzhou through the heating season were significantly greater than those throughout the nonheating season, and the brown carbon content throughout the heating season was greater than that throughout the nonheating season. With regards to the source of EBC, our study shows that the source throughout the heating season is primarily coal and biomass used for heating. The sources of Sudan IV Technical Information aerosols through the nonheating season primarily consist of petroleum along with other liquid sources utilized for transportation. Throughout the period of higher EBC concentrations, the heating season was mostly concentrated throughout the Chinese Spring Festival, and also the nonheating season was concentrated Sulfentrazone MedChemExpress during periods of low rainfall. Backward trajectory analysis shows that during the heating season, the vast majority of EBC concentrations are derived from northern and northwestern winds. The results show that the provinces for the north are the primary supply of EBC in Xuzhou. The potential source contribution function (PSCF) model obtains comparable results as the backward trajectory analysis. The majority on the heating season pollution comes from the north, along with the sources on the nonheating season are evenly distributed from the area surrounding Xuzhou. As a result, these outcomes indicate that EBC emissions during the heating season in northern China, such as these of Xuzhou, are high and that there is a threat that pollutants will diffuse into low-concentration regions inside the atmosphere. When controlling EBC emissions and suppressing pollution sources, consideration needs to be provided towards the diffusion of pollution sources.Author Contributions: Writing, visualization, formal evaluation, G.S.; methodology, W.C.; conceptualization, H.Z.; supervision, S.S.; validation, Y.W. All authors have read and agreed towards the published version from the manuscript. Funding: This research was funded by the National Natural Science Foundation of China (grant number 41701391) and Important Investigation and Improvement System of Guangxi (AB18050014). Institutional Critique Board Statement: Not applicable. Informed Consent Statement: Not applicable. Information Availability Statement: Information sharing isn’t applicable. Conflicts of Interest: The authors declare no conflict of interest.
atmosphereArticleEffects of Linewidth Broadening Technique on Recoil of Sodium Laser Guide StarXiangyuan Liu 1,two, , Xianmei Qian three , Rui He 1 , Dandan Liu 1 , Chaolong Cui three , Chuanyu Fan 1 and Hao YuanSchool of Electrical and Photoelectronic Engineering, West Anhui University, Lu’an 237012, China; [email protected] (R.H.); [email protected] (D.L.); [email protected] (C.F.); [email protected] (H.Y.) State Important Laboratory of Pulsed Power Laser Technologies, College of Electronic Countermeasures, National University of Defense Technologies, Hefei 230031, China Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China; [email protected] (X.Q.); [email protected] (C.C.) Correspondence: [email protected]; Tel.: +86-Citation: Liu, X.; Qian, X.; He, R.; Liu, D.; Cui, C.; Fan, C.; Yuan, H. Effects of Linewidth Broadening Strategy on Recoil of Sodium Laser Guide Star. Atmosphere 2021, 12, 1315. https://doi.org/10.3390/ atmos12101315 Academic Editors: Nataliya V.
